September weather forecast
Randolph, MA

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Weather in September

The first month of the autumn, September, is also an agreeable month in Randolph, Massachusetts, with an average temperature ranging between min 56.5°F (13.6°C) and max 72.7°F (22.6°C).

Temperature

September brings a minor shift in the average high-temperature, adjusting from a warm 80.4°F (26.9°C) in August to a pleasant 72.7°F (22.6°C). In Randolph, the average nighttime temperature during September is a mild 56.5°F (13.6°C).

Humidity

The average relative humidity in September is 76%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.5" (38mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:10 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:26 pm EDT.

Sunshine

In September, the average sunshine in Randolph is 8.4h.

UV index

In September, the average daily maximum UV index in Randolph is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 4 during September morphs into the following directions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

What are September temperatures in Randolph?

The average high-temperature, in September, in Randolph, is 72.7°F (22.6°C), while the average low-temperature is 56.5°F (13.6°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 86°F (30°C).

What is the average humidity in September in Randolph?

In Randolph, Massachusetts, the average relative humidity in September is 76%.

What is the driest month in Randolph?

The month with the least rainfall in Randolph is September, when the rain falls for 11.8 days and typically collects 1.5" (38mm) of precipitation.

How much does it rain in Randolph in September?

In Randolph, Massachusetts, in September, during 11.8 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

When it does not snow in Randolph?

In Randolph, Massachusetts, snow does not fall in May through September.

Does it snow in Randolph in September?

In Randolph, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Randolph?

In Randolph, the average day length in September is 12h and 28min.

When are sunrise and sunset in September in Randolph?

In September, on the first day of the month, sunrise is at 6:10 am and sunset at 7:17 pm. On the last day of the month, in Randolph, sunrise is at 6:40 am and sunset at 6:26 pm EDT.

How long on average sun shines in September in Randolph?

The average sunshine duration in September in Randolph, Massachusetts, is 8.4h.

How high is the UV index in September in Randolph?

In Randolph, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Randolph, MA

Average temperature in September - Randolph, MA
  • Average high temperature in September: 72.7°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in September: 56.5°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in September
Randolph, MA

Average pressure in September - Randolph, MA
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Randolph, MA

Average wind speed in September - Randolph, MA
  • Average wind speed in September: 6.5mph

The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in September
Randolph, MA

Average humidity in September - Randolph, MA
  • Average humidity in September: 76%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).

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Average rainfall in September
Randolph, MA

Average rainfall in September - Randolph, MA
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.5").

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Average rainfall days in September
Randolph, MA

Average rainfall days in September - Randolph, MA
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is July (15.8 days).
The months with the least rainy days are January and February (7.8 days).

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Average snowfall in September
Randolph, MA

Average snowfall in September - Randolph, MA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (5.24").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Randolph, MA

Average snowfall days in September - Randolph, MA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Randolph, MA

Average daylight in September / Average sunshine in September - Randolph, MA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in September
Randolph, MA

Average sunshine days in September - Randolph, MA
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is April (13.2 days).

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Average UV index in September
Randolph, MA

Average UV index in September - Randolph, MA
  • Average UV index in September: 4

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Randolph, MA

Average cloud cover in September - Randolph, MA
  • Average cloud cover in September: 37

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in September
Randolph, MA

Average visibility in September - Randolph, MA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Randolph, Massachusetts, USA

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